marc.see
The upgrade to 17.0->17.1 is similar to other SDM upgrades, however it is not as "complex".
In terms of time for the upgrade, there are many variables that come into play - # of servers, hardware resources, size of MDB etc.
The RU1 patch will not take as long but again is dependent on the # of servers and hardware resources available on each server.
If you have recently upgraded SDM or applied a cumulative patches, you can use the time and effort required as a baseline for the 17.1 upgrade and applying the RU1 patch.